The brand’s primary goal is to recreate sound as naturally as possible by mimicking a point source that radiates in all directions. Key technical features include:
Poly-directional Arrays: Multiple drivers arranged at various angles to create a wide, indirect soundstage.
Unusual Enclosures: Cabinets are typically made of Finland Birch ply with minimal baffle areas to reduce diffraction.
Bass Loading: Many models use a folded transmission line terminating in a passive radiator or a specialized mechanical filtering system called “acoustic lenses”.
Crossovers: Designed for musical value rather than computer-calculated technical specs, often featuring non-resistive components to eliminate standing waves.
Brand: Shahinian Acoustics Ltd
Model Name/Number: Diapason
Price (RRP): £26000
Choice Hifi Price: £11990
Product Information:
Double Eagle Stereo Subwoofer
Twin, back-to-back, hybrid transmission line/passive radiator bass chamber design with two 8” polypropylene curvilinear cone drivers. Features woofers with 1 ½” high-temperature patented D.D. voice coils and34-oz. Ceramic magnets; ¾” Finland Birch cabinet construction; built in 140 Hz/280 Hz 18 dB passive filters which may be bypassed for bi-amp operation; bridgeable into mono mode for double unit operation or stacked for quadruple high-power function. 5-way binding posts. Sits on 4 twin-wheel casters. 3-position passive input filter module optional. May be purchased separately from Diapason module.
Power handling: 300W max
Frequency Response: -3dB/23-140 Hz
Nominal Impedance: 6 ohms.
Sensitivity: 86 dB
Dimensions: 23” x 15” x 32”
Finish: Oak, Walnut, Cherry, or Rosewood
Weight: 105 lbs.
Diapason Module
Four 5 ¼” curved poly cone low/midrange drivers, two 1 ½” Titanium dome high midrange drivers, two 3” cambric dome low tweeters, and six ½” W-shaped Titanium dome supertweeters. Designed to fit precisely atop the Double Eagle subwoofer. Features cabinet constructed of 13-ply Finland Birch, and shaped as an asymmetric prism with unequal rakes fore and aft, and equal rakes left and right; also wall-mountable at some distance from subwoofer; low midrange drivers have 1-in voice coil and 20-oz ceramic magnet, high midranges have special east/west magnet structure, and low tweeters have phase correcting faceplate; electrical distribution is four stage branch circuit of first and third order filters for minimum phase function; 2 optional input filter choices, or direct bypass for electronic crossover and biamp function; other variations include biwiring and twin amplification; internal wiring consists of Kimber 4tc with low flux pure solder.
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